Function t_inspect 

pub unsafe extern "C-unwind" fn t_inspect<T: Altrep>(
    x: SEXP,
    pre: i32,
    deep: i32,
    pvec: i32,
    inspect_subtree: Option<unsafe extern "C-unwind" fn(SEXP, i32, i32, i32)>,
) -> Rboolean

Trampoline for Inspect method.

Safety

x must be a valid SEXP for the ALTREP class backed by T.